Adefendant charged with aggravated assault of a hiker who wandered through his campsite in a national park has alleged that he shot at the hiker in self-defense. the defendant testified that when the hiker crossed the campsite at dusk, the defendant thought that the hiker intended to rob him. the prosecution wishes to call a bartender to testify that the year before, the defendant had fired at another patron of the bar, then publicly claimed that he had done so in self-defense, while privately admitting to the bartender that he done so simply for the fun of it. is the bartender’s testimony admissible?